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Table 8 The ANOVA summary (a) main treatment significance level and (b) volume production per treatment across three sites over time of a trial in the second and third rotation sites established in 1991

From: The importance of harvest residue and fertiliser on productivity of Pinus patula across various sites in their first, second and third rotations, at Usutu Swaziland

Treatment

Age (years)

7

9

(a) Main treatment significance level

 

Level of statistical significance of F-test

Second rotation (S2R)

 Site preparation

***

***

 Fertiliser

***

***

 Interaction

n.s.

n.s.

Third rotation (S3R)

 Site preparation

***

**

 Fertiliser

**

**

 Interaction

n.s.

n.s.

(b)

 

Volume production (m3 ha−1)

Second rotation (S2R)

 Residue removed

102 b

155 b

 Control

145 a

196 a

 Lime

146 a

204 a

 Standard error of mean

5.9

7.8

 LSD0.05 for site preparation

16.6

21.9

 No fertiliser

118 B

170 B

 Fertilised

145 A

200 A

 Standard error of mean

4.8

6.3

 LSD0.05 for site preparation

13.5

17.9

 Grand mean

131

185

Third rotation (S3R)

 Residue removed

91 b

138 b

 Control

153 a

207 a

 Lime

151 a

206 a

 Standard error of mean

4.6

5.7

 LSD0.05 for site preparation

13.1

16.1

 No fertiliser

124 B

175 B

 Fertilised

139 A

192 A

 Standard error of mean

3.8

4.6

 LSD0.05 for site preparation

10.7

13.1

 Grand mean

132

184

  1. Different letters indicate significant differences between the means at the 5% level within each rotation. Lowercase letters for site preparation and uppercase for fertiliser
  2. n.s. not significantly different
  3. * = 5% level, ** = 1% level, *** = 0.1% level